If This Pill Prevents HIV, Why Is No One Taking It?

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It’s been over a year since The FDA approved Truvada, a once a day medication that prevents HIV infection. But why are so few people taking it? Dr. Robert Grant, a professor at the University of California San Francisco, talks about the drug and why it’s slow to catch on. He’s the lead scientist who developed the treatment, which is known as “pre-exposure prophylaxis” or PrEP.